66498027 has 4 divisors (see below), whose sum is σ = 88664040. Its totient is φ = 44332016.

The previous prime is 66498001. The next prime is 66498031. The reversal of 66498027 is 72089466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66498027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66498027.

It is not an unprimeable number, because it can be changed into a prime (66498227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11083002 + ... + 11083007.

It is an arithmetic number, because the mean of its divisors is an integer number (22166010).

Almost surely, 2^66498027 is an apocalyptic number.

66498027 is a deficient number, since it is larger than the sum of its proper divisors (22166013).

66498027 is a wasteful number, since it uses less digits than its factorization.

66498027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22166012.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 66498027 is about 8154.6322418611. The cubic root of 66498027 is about 405.1379441704.

The spelling of 66498027 in words is "sixty-six million, four hundred ninety-eight thousand, twenty-seven".